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- /*
- newscn.c - implementation of the elf_newscn(3) function.
- Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
- #include <private.h>
-
- static Elf_Scn*
- _buildscn(Elf *elf, size_t size) {
- Elf_Scn *scn;
-
- elf_assert(elf);
- elf_assert(size);
- elf_assert(_elf_scn_init.s_magic == SCN_MAGIC);
- while ((scn = (Elf_Scn*)malloc(sizeof(*scn) + size))) {
- *scn = _elf_scn_init;
- scn->s_elf = elf;
- scn->s_shdr = (char*)(scn + 1);
- memset(scn->s_shdr, 0, size);
- scn->s_scn_flags = ELF_F_DIRTY;
- scn->s_shdr_flags = ELF_F_DIRTY;
- scn->s_freeme = 1;
- if (elf->e_scn_n) {
- scn->s_index = elf->e_scn_n->s_index + 1;
- elf->e_scn_n->s_link = scn;
- elf->e_scn_n = scn;
- return scn;
- }
- elf_assert(scn->s_index == SHN_UNDEF);
- elf->e_scn_1 = elf->e_scn_n = scn;
- }
- seterr(ERROR_MEM_SCN);
- return NULL;
- }
-
- Elf_Scn*
- elf_newscn(Elf *elf) {
- Elf_Scn *scn;
-
- if (!elf) {
- return NULL;
- }
- elf_assert(elf->e_magic == ELF_MAGIC);
- if (!elf->e_ehdr && !elf->e_readable) {
- seterr(ERROR_NOEHDR);
- }
- else if (elf->e_kind != ELF_K_ELF) {
- seterr(ERROR_NOTELF);
- }
- else if (elf->e_ehdr || _elf_cook(elf)) {
- elf_assert(elf->e_ehdr);
- if (elf->e_class == ELFCLASS32) {
- if ((scn = _buildscn(elf, sizeof(Elf32_Shdr)))) {
- ((Elf32_Ehdr*)elf->e_ehdr)->e_shnum = scn->s_index + 1;
- elf->e_ehdr_flags |= ELF_F_DIRTY;
- return scn;
- }
- }
- else if (valid_class(elf->e_class)) {
- seterr(ERROR_UNIMPLEMENTED);
- }
- else {
- seterr(ERROR_UNKNOWN_CLASS);
- }
- }
- return NULL;
- }
-